Reiko raised Yuuya on her own. Now that he has become an adult, he uses his savings to treat her to a hot spring trip as a token of gratitude. However, this journey is more than just an expression of thanks—it is also Yuuya's chance to confess his romantic feelings for Reiko as a woman. Throughout the trip, he struggles to honestly reveal his true emotions. Filled with warmth and affection, their time together becomes a turning point that deepens their bond in ways neither expected.